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 * @Date: 2021-08-06 16:22:49
 * @LastEditTime: 2021-08-06 16:26:26
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 * @FilePath: \Self\11.html
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<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="UTF-8" />
    <meta http-equiv="X-UA-Compatible" content="IE=edge" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <title>Document</title>
  </head>
  <body>
    <script>
      let obj = {
        a: 10,
        b: 20,
      };
      for (const key in obj) {
        console.log(key);
        console.log(obj[key]);
      }
    </script>
  </body>
</html>
